The North Carolina Department of Environment and Natural Resources, Division of Water Quality, Planning Branch in cooperation with the NC Center for Geographic Information and Analysis, developed the GIS data set, National Pollutant Discharge Elimination System Sites(NPDES), to enhance planning, siting, and impact analysis in areas which are directly affected by these sites. The file identifies outfall locations for individual NPDES permitted wastewater discharges to surface waters in North Carolina.

Purpose:

These data were created to assist governmental agencies and others in making resource management decisions through use of a Geographic Information System (GIS).

Supplemental_Information:

system filename : npdes file size = Less than 0.5 megabyte
Revisions and updates to this layer include:
9.) filename: npdes03 The October 22, 2003 update consisted of
obtaining the most current NPDES data from the Division of Water
Quality, NPDES Unit (September 4, 2003). Latitude/longitude coordinates were the best available; some points have been collected using Global Positioning Systems; not all points have been included in ground-truthing efforts.
8.) filename: npdes1000 The October 11, 2000 updates consisted of
obtaining the most current NPDES data from the Division of Water
Quality to replace existing data. .PAT items incorporated into
the new version that did not exist in the December 1998 version
include: permpipe, status, majorminor, issuedate, expdate,
flow_mgd, dc1, dc2, dc3, dc4, dc5, region, lat, long, and class.
(For further details on the items, see Entity_and_Attribute_Information
section.) .PAT items removed include date (Last time point was
checked by technician for accuracy) and MAP# (DWQ quadrangle map
index number). NOTE: The following permits were removed from the
database: NC0007064, NC0074578, NC0084883, and NC0086304.
(Because of lat/long problems, these points fell outside the state,
and NCDWQ did not have staff available to research and rectify
these errors.)
7.) filename: npdes1298 The December 1998 update to this layer
consisted of projecting the data from NAD27 datum, State Plane
projection, units of measure feet TO: NAD83 DATUM, State Plane
PROJECTION, UNITS OF MEASURE METERS. This was done to comply with
the NC Geographic Information Coordinating Council's "Statement of
Direction for North Carolina Corporate Geographic Database
Horizontal Reference, Datum and Unit of Measure". This reprojecting
was done in various ways depending on the data type and content.
Vector data was projected using the 'project' command in ESRI's Arc
software and topology was cleaned and built based on coverage needs.
Raster data was projected using ESRI's Grid module and various steps
as applicable.
6.) filename: npdes 694 The June 28, 1994 file contains 3,280 points.
5.) filename: npdes1293 (previously named nc.npdes1293)
The December, 10 1993 file contains 3,294 points.
4.) filename: npdes893 (previously named nc.npdes893)
August 1, 1993
3.) filename: npdes593 (previously named nc.npdes593)
May 1, 1993
2.) filename: npdes193 (previously named nc.npdes193)
January 26, 1993
1.) filename: npdes1291 (previously named nc.npdes1291)
December 1991 version.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date:
REQUIRED: The year (and optionally month, or month and day) for which the data set corresponds to the ground.

Range_of_Dates/Times:

Beginning_Date:
199112

Ending_Date:
20001011

Currentness_Reference:

Data creation and revision dates

Status:

Progress:
Lat/Longs are best available data and have not been field verified for all sites.

Maintenance_and_Update_Frequency:
Quarterly or as needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate:
-84.311291

East_Bounding_Coordinate:
-75.430031

North_Bounding_Coordinate:
36.573218

South_Bounding_Coordinate:
33.769517

Keywords:

Theme:

Theme_Keyword_Thesaurus:
None

Theme_Keyword:
pollution

Place:

Place_Keyword_Thesaurus:
William S. Powell, The North Carolina GAZETTEER, A Dictionary of Tar Heel Places, (Chapel Hill: University of North Carolina Press), August 1984.

Place_Keyword:
North Carolina

Access_Constraints:
None

Use_Constraints:

Acknowledgement of products derived from this data set should cite the following: The source of the National Pollutant Discharge Elimination System Sites (NPDES) data is the North Carolina Corporate Geographic Database. Earlier versions of this dataset may exist. The user must be sure to use the appropriate data set for the time period of interest. While efforts have been made to ensure that these data are accurate and reliable within the state of the art, CGIA cannot assume liability for any damages or misrepresentation caused by any inaccuracies in the data or as a result of changes to the data caused by system transfers.

The NC DENR Water Quality Planning Section presented the NPDES sites to NC CGIA as Excel spreadsheets. They were converted to ARC/INFO coverages and were given attributes also supplied by the Water Quality Planning Branch. The digital files were plotted and any necessary label corrections were made.

Logical_Consistency_Report:

Using ESRI's ARC/INFO GIS software, the dataset was built for points using the "build" command. Topology has not been edited since the last build or clean.

Completeness_Report:

These data represent the locations and identities of National Pollutant Discharge Elimination System Sites in North Carolina as identified by the Water Quality Planning Section.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

The National Pollutant Discharge Elimination System Sites were originally marked on 7.5 Minute USGS paper topographic maps which meet National Map Accuracy Standards. Sites were located using a best estimate with reference to surrounding features. The NPDES unit now maintains latitude/longitude coordinates in tabular format.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator:
NC DENR - Div. of Water Quality, Water Quality Section

Publication_Date:
19940628

Title:

National Pollutants Discharge Elimination System Sites

Geospatial_Data_Presentation_Form:
Map

Publication_Information:

Publication_Place:
Raleigh, North Carolina

Publisher:
NC DENR - Div. of Water Quality, Water Quality Section

Other_Citation_Details:

Data is updated as needed

Source_Scale_Denominator:
24000

Type_of_Source_Media:
Paper

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date:
199112

Ending_Date:
19940628

Source_Currentness_Reference:

Original release date and revision date, respectively

Source_Citation_Abbreviation:

None

Source_Contribution:

Locations of National Pollutants Discharge Elimination System Sites

Source_Information:

Source_Citation:

Citation_Information:

Originator:
US Geological Survey

Publication_Date:
Unknown

Title:

USGS 7.5 Minute series quadrangles

Geospatial_Data_Presentation_Form:
Map

Publication_Information:

Publication_Place:
Reston, Virginia

Publisher:
US Geological Survey

Other_Citation_Details:

Published map series

Source_Scale_Denominator:
24000

Type_of_Source_Media:
Paper

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date:
1938

Ending_Date:
1990

Source_Currentness_Reference:

Publication dates of quadrangles

Source_Citation_Abbreviation:

None

Source_Contribution:

Paper maps used to delineate the National Pollutants Discharge Elimination System Sites

Process_Step:

Process_Description:

Latitude and Longitude coordinates of existing points of pollution were originally derived from USGS 7.5 minute Quadrangles; recent data have been added or checked using Global Positioning Systems at the sites.

Process_Date:
199112

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:
NCDENR-Division of Water Quality, Water Quality Section

Contact_Address:

Address_Type:
Mailing address

Address:

1617 Mail Service Center

City:
Raleigh

State_or_Province:
North Carolina

Postal_Code:
27699-1617

Country:
U.S.A.

Contact_Voice_Telephone:
(919) 733-5083

Contact_Facsimile_Telephone:
(919) 715-5637

Hours_of_Service:
8:00am to 5:00pm

Contact Instructions:

Phone or electronic mail

Process_Step:

Process_Description:

The DWQ ASCII files were converted to ARC/INFO version 5.0. The digital files were attributed and checkplots were created for review by the Water Quality Section. Necessary corrections were made and new plots were run. CGIA updates the digital file as needed.

Process_Date:
199112

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person:
David Giordano

Contact_Organization:
NCCGIA

Contact_Position:
GIS Analyst

Contact_Address:

Address_Type:
Mailing address

Address:

20322 Mail Service Center

City:
Raleigh

State_or_Province:
North Carolina

Postal_Code:
27699-0322

Country:
U.S.A.

Contact_Voice_Telephone:
(919) 733-2090

Contact_Facsimile_Telephone:
(919)715-0725

Contact_Electronic_Mail_Address:
dataq@cgia.state.nc.us

Hours_of_Service:
8:30AM - 5:30PM

Contact Instructions:

Phone and electronic mail preferred

Process_Step:

Process_Description:

Data are output from a DWQ Excel spreadsheet maintained by the DWQ NPDES Unit last updated on
September 4, 2003. CGIA converted latitude and longitude fields (degrees/minutes/seconds) to
decimal degrees, created an event theme in ArcView 3.x, and projected the resulting point theme
to state plane coordinates, NAD 1983 meters. CGIA did quality control on the points with county
boundaries, detailed hydrography and previous NPDES points as base layers.

Concatenation of permit and pipe numbers to create a unique ID for each pipe

Attribute_Definition_Source:

NC DENR-Div. of Water Quality, Water Quality Section

Attribute_Domain_Values:

Unrepresentable_Domain:

Permpipe number varies in number of characters.

Attribute_Measurement_Frequency:

As needed

Attribute:

Attribute_Label:
LAT_SHP

Attribute_Definition:

Latitude of outfall in DDMMSS

Attribute_Definition_Source:

NC DENR-Div. of Water Quality, Water Quality Section

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum:
335235

Range_Domain_Maximum:
363339

Attribute_Measurement_Frequency:

As needed

Attribute:

Attribute_Label:
LONG_SHP

Attribute_Definition:

Longitude of outfall in DDMMSS

Attribute_Definition_Source:

NC DENR-Div. of Water Quality, Water Quality Section

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum:
752815

Range_Domain_Maximum:
841323

Attribute_Measurement_Frequency:

As needed

Attribute:

Attribute_Label:
STREAM

Attribute_Definition:

Stream receiving discharge

Attribute_Definition_Source:

NC DENR-Div. of Water Quality, Water Quality Section

Attribute_Domain_Values:

Unrepresentable_Domain:

Stream names vary in length and number of words

Attribute_Measurement_Frequency:

As needed

Attribute:

Attribute_Label:
CLASS

Attribute_Definition:

DWQ stream classification for watershed

Attribute_Definition_Source:

NC DENR-Div of Water Quality, (Water Quality Planning Section)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value:
B

Enumerated_Domain_Value_Definition:

Waters used for primary recreation and other uses suitable for Class C

Enumerated_Domain_Value_Definition_Source:

NC DENR-Div. of Water Quality, Water Quality Section

Enumerated_Domain:

Enumerated_Domain_Value:
C

Enumerated_Domain_Value_Definition:

Waters protected for secondary recreation, fishing, wildlife, fish and aquatic life propagation and survival, agriculture and other uses suitable for Class C

Enumerated_Domain_Value_Definition_Source:

NC DENR-Div. of Water Quality, Water Quality Section

Enumerated_Domain:

Enumerated_Domain_Value:
CA

Enumerated_Domain_Value_Definition:

Indicates a Critical Area within a water supply watershed

Enumerated_Domain_Value_Definition_Source:

NC DENR-Div. of Water Quality, Water Quality Section

Enumerated_Domain:

Enumerated_Domain_Value:
HQW

Enumerated_Domain_Value_Definition:

High Quality Waters which are waters that are rated as excellent based on biological and physical/chemical characteristics through division monitoring or special studies; native and special native trout waters (and their tributaries) designated by the Wildlife Resources Commission; primary nursery areas (PNA) designated by the Marine Fisheries Commission and other functional nursery areas designated by the Wildlife Resources Commission; critical habitat areas designated by the Wildlife Resources Commission or the Department of Agriculture; all water supply watersheds which are either classified as WS-I or WS-II or those for which a formal petition for reclassification as WS-I or WS-II has been received from the appropriate local government and accepted by the Division of Environmental Management; and all Class SA waters.

Waters which have low velocities and other natural characteristics which are different from adjacent streams.

Enumerated_Domain_Value_Definition_Source:

NC DENR-Div. of Water Quality, Water Quality Section

Enumerated_Domain:

Enumerated_Domain_Value:
Tr

Enumerated_Domain_Value_Definition:

Suitable for natural trout propagation and maintenance of stocked trout

Enumerated_Domain_Value_Definition_Source:

NC DENR-Div. of Water Quality, Water Quality Section

Enumerated_Domain:

Enumerated_Domain_Value:
WS-I

Enumerated_Domain_Value_Definition:

Waters protected as water supplies which are in natural and undeveloped watersheds

Enumerated_Domain_Value_Definition_Source:

NC DENR-Div. of Water Quality, Water Quality Section

Enumerated_Domain:

Enumerated_Domain_Value:
WS-II

Enumerated_Domain_Value_Definition:

Waters protected as water supplies which are generally in predominantly undeveloped watersheds

Enumerated_Domain_Value_Definition_Source:

NC DENR-Div. of Water Quality, Water Quality Section

Enumerated_Domain:

Enumerated_Domain_Value:
WS-III

Enumerated_Domain_Value_Definition:

Waters protected as water supplies which are generally in low to moderately developed watersheds

Enumerated_Domain_Value_Definition_Source:

NC DENR-Div. of Water Quality, Water Quality Section

Enumerated_Domain:

Enumerated_Domain_Value:
WS-IV

Enumerated_Domain_Value_Definition:

Waters protected as water supplies which are generally in moderately to highly developed watersheds

Enumerated_Domain_Value_Definition_Source:

NC DENR-Div. of Water Quality, Water Quality Section

Enumerated_Domain:

Enumerated_Domain_Value:
WS-V

Enumerated_Domain_Value_Definition:

Waters protected as water supplies which are generally upstream and draining to Class WS-IV waters or waters used by industry to supply their employees with drinking water or as waters formerly used as water supply

NC CGIA is charged with the development and maintenance of the State's corporate geographic database and, in cooperation with other mapping organizations, is committed to offering its users accurate, useful, and current information about the state. Although every effort has been made to ensure the accuracy of information, errors and conditions originating from physical sources used to develop the corporate database may be reflected in the data supplied. The client must be aware of data conditions and bear responsibility for the appropriate use of the information with respect to possible errors, original map scale, collection methodology, currency of data, and other conditions specific to certain data. NC CGIA does not support secondary distribution of this data. The use of trade names or commercial products does not constitute their endorsement by the NC CGIA or North Carolina State Government.

Data creation and large data analysis jobs contact Database Administration P:(919)733-2090. All data is available through standard ordering procedures on a cost recovery basis.

Technical_Prerequisites:

All formats supplied are created using ARC/INFO GIS software on Unix workstations. Other formats are available. Format compatibility is the user's responsibility. For more information on formats and media, use a web browser: FORMAT/MEDIA INFORMATION - <http://www.cgia.state.nc.us/cost.html>

This metadata file is to accompany the data set identified and received from NC CGIA. NC CGIA does not support secondary distribution. If this data file was received from anyone besides NC CGIA, this metadata file and the data set it describes may contain discrepancies.
Generated by mp version 2.6.0 on Wed Oct 22 14:05:05 2003